in april the exploratorium is scheduled to reopen at peer 15. the museum says it hosts 500,000 people every year. >>> freeze warning for the north bay valleys and mountains this morning. 29 degrees. residents bundled up as they headed out to face the chilly temperatures. >> we are going to buy some coffee. >> reporter: pretty cold? >> pretty cold. >> i got sweater and i got my jacket. >> reporter: you have four players? >> yep. >> other chilly spots, santa rosa, napa, livermore, redwood city and morgan hill. >>> more about the weather now, during the day it is nice, but as soon as the sun goes down it gets cold. >> yeah. dress in layers. temperatures off to a cold start again. a look at the chilly over night temperatures from this morning. this list of 20s showing up, santa rosa, napa, livermore. fairfield 27. walnut creak 29 degrees. over night tonight we do not have a frost advisory or freeze warning but still cold. patchy frost will be "likely" as we -- likely as we head into your thursday. one thing that could warm us up, high clouds off sho